\begin{tikzpicture}
    \tkzDefPoints{-0.5/1.5/C, 0.5/-1.5/D}
    \tkzDefMidPoint(C,D)  \tkzGetPoint{O}
    \tkzDefTriangle[two angles= 70 and 70](O,C)  \tkzGetPoint{A}
    \tkzDefTriangle[two angles= 70 and 70](O,D)  \tkzGetPoint{B}
    \tkzDrawPolygon(O,C,A)
    \tkzDrawPolygon(O,D,B)
    \tkzLabelPoints[left](A)
    \tkzLabelPoints[right](B)
    \tkzLabelPoints[above](C)
    \tkzLabelPoints[below](D)
    \tkzLabelPoints[below left](O)
\end{tikzpicture}
